Drive-well point and strainer



n Mart. 13, 1923. l 448 233 l v. H. NlcKERsoN DRIVE WELL IVOI'NT ANDSTRAINER Filed Feb. 2o, 192g nwwtoz l l @1k/tow ms Patented Mar. 13,1923.

VICTOR H. NICKERSON, OF COTUIT, MASSACHUSETTS.

DRIVE-WELL POINT AND s'rRAINEa.

Application filed February 20, 1922. Serial No. 537,829.

To all whom t may conce/rn:

Be it known that I, VICTOR H. NioKnnsoN, a citizen of the United States,residing at Cotuit, in the county of Barnstable and State.

of Massachusetts, have invented certain new and useful Improvements inDrive-IVell Points and Strainers; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to an improved drive well point and strainer, andit has for one of its objects to generally improve upon devices of thisclass by producing one vof extreme simplicity and durability wherein theconstruction is such that the parts are not liable to become disarrangedduring the driving operation.

More specifically speaking, it is the principal object of the inventionto provide a device of this class embodying among other details, anapert-ured tubular casing in which a wire mesh strainer is located,together with means between the strainer and casing for absorbing shocksto which the strainer is subjected.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a. part of this specific-ation andin which like numerals are employed to designate like parts throughoutthe same:

Figure 1 is aI central vertical sectional view, with parts in elevation,through a drive well point and strainer constructed in accordance withthis invention.

Figure 2 is a view like Figure 1 showing the novel details n section.

Figure is an elevational view of one of the tubular anchoring members.

Figure 4 is a top plan view of the anchoring member shown in Figure 3.

Figure 5 is a vertical sectional view of said member.

Figure 6 is a transverse section .taken on the line 6-6 of Fig. 2.

Referring to the drawings in detail, the numeral 1 designates a tubularcasing formed with a plurality of closely spaced apertures for passageof the fluid. Arranged inside of this casing and having its endsterminating short of the ends of the latter is a comparatively fine wiremesh tubular strainer 2. It may be conveniently stated here thatexperience has taught that during the driving of a well with a device ofthis class, the strainer is subjected to severe shocks and it isdesirable to eliminate this as much as possible. Consequently, in thespaces between the ends of the strainer and corresponding ends of thecasing, I provide novel shock absorbing means. The shock absorbing meansin its preferred form comprises ring-like cushions 3 formed of elasticmaterial, these being secured inside of the casing in any 'suitable wayin a position to permit the opposite or adjacent ends of the strainer toabut them as clearly shown in Fig. 2. The preferred means for securingthese cushions in place comprises a pair of tubular anchoring members land 5 respectively, the first named of which is located at the upper endof the casing and formed at its outer end with a flaring flange 6engaging the inner wall of the casing as shown. The inner end of thismember projects into the strainer and one of the aforesaid cushionssurrounds the same. To maintain the cushion in proper position on themember, the latter is equipped intermediate its ends with shoulderswhich are preferably in the form of a plurality of closely spacedtongues 7 struck outwardly therefrom. Although it is not essential, thelower tubular anchor 5 is preferably integral with the point 8 and it islikewise provided intermediate its ends with struck-nut tongues 7providing the shoulders against which the lower cushion rests. It is ofcourse understood that these tubular anchoring members are permanentlysecured to the casing 1 by any suitable means to prevent displacementthereof.

In a device constructed in accordance with the foregoing description, itwill be seen that during the driving of a well, the shock to which thestrainer is usually subjected, will be absorbed by the rubber orresilient cushions at the opposite ends thereof with which it abuts. l

By carefully considering the description in connection with thedrawings, persons familiar with devices of this class will doubtless beable to obtain a clear understanding of the invention. Therefore, a morelengthy and detailed description is deemed unnecessary.

Since probably the best results may be obtained with the constructionand arrangement herein-shown and described, this is taken as thepreferred embodiment of the invention.

However, I Wish it to be understood that minor changes. coming Withinthe scope of the invention as claimed mayl be resorted to ii desired.

I claim:

l. A device of the class described including a tubular apertured casing,a strainer located therein, and shockabsorbing means between thestrainer and the casing.

2. A device or' the class described comprising a tubular aperturedcasing, a cushion arranged inside of the casing adjacent one of the endsthereof, and av strainer also located in saidvcasing and having one ofits ends engaged with said cushion.

3. A device of the class described comprising a tubular aperturedcasing, yeldable ring-like cushions secured therein, and a strainer alsolocated in said casing and having its opposite ends arranged in abuttingrelation with said cushion.

4. A drive Well point and strainer comprising a tubular aperturedcasing, anchoring membersV telescoping into the opposite ends of saidcasing and carrying elastic -surrounding` said anchoring members -andinterposed between said shoulders and the adjacent ends of saidstrainer.

6. A device of the class described including a tubular anchoring memberhaving a plurality of spring tongues struck out therefroml intermediateits ends to `l'orm shoul ders, and a ring-like cushion surrounding saidmember and engaging said shoulders.

In testimony whereof l have hereunto set my hand.

VICTOR H. NICKERSON.

